{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T15:59:06Z","timestamp":1790265546613,"version":"4.1.0"},"reference-count":58,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Ligand field induced electronic structure modulation provides an effective pathway to tune the electrochemical functionality of Prussian Blue Analogue molecular magnets. Partial substitution of Fe by Co\n                    <jats:sup>2+<\/jats:sup>\n                    in Fe\u2013C\u2261N\u2013Fe framework forms cobalt iron hexacyanoferrate (KCoFeHCF), significantly modifying the local ligand field and metal\u2013cyanide bonding through strong Co\/Fe\u2013N\u2261C\u2013Fe linkages. It alters\n                    <jats:italic>d<\/jats:italic>\n                    \u2010orbital splitting and spin configuration, producing an additional low\u2010spin Fe\n                    <jats:sup>3+<\/jats:sup>\n                    state alongside high\u2010spin Fe\n                    <jats:sup>3+<\/jats:sup>\n                    and low\u2010spin Fe\n                    <jats:sup>2+<\/jats:sup>\n                    states. Enhanced charge redistribution and electron delocalization across the framework stabilizes these states and increase the crystal field stabilization energy to \u22125.2 \u0394\n                    <jats:sub>0<\/jats:sub>\n                    + 6P, compared with \u22122.4 \u0394\n                    <jats:sub>0<\/jats:sub>\n                    + 3P for KFeHCF and \u22122.8 \u0394\n                    <jats:sub>0<\/jats:sub>\n                    + 4P for KCoHCF, improving structural stability. Density functional theory confirms preferential electron redistribution toward low\u2010spin Fe sites. Importantly, ligand field modulation activates the otherwise inaccessible Co\n                    <jats:sup>2+<\/jats:sup>\n                    \/Co\n                    <jats:sup>3+<\/jats:sup>\n                    redox couple by lowering its operating potential from \u223c1.92 to \u223c0.6\u00a0V, enabling a triple\u2010redox mechanism involving Co\u2013N, Fe\u2013N, and Fe\u2013C environments. KCoFeHCF delivers \u223c148 mAh\/g at 2.5 A\/g with 88% capacity retention after 180 cycles. Full cell achieves \u223c58\u00a0Wh\/ kg at \u223c1505\u00a0W\/kg and retains \u223c60% capacity after 5000 cycles, demonstrating excellent electrochemical durability and promising potential for aqueous potassium\u2010ion batteries.\n                  <\/jats:p>","DOI":"10.1002\/smll.75891","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T14:59:56Z","timestamp":1790261996000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ligand Field Induced Electronic Structure Modulation Enables Triple Redox Activity in Prussian Blue Analogue Molecular Magnet for Advanced Potassium Ion Battery"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0369-4143","authenticated-orcid":false,"given":"Nilasha","family":"Maiti","sequence":"first","affiliation":[{"name":"Solid State Physics Division Bhabha Atomic Research Centre  Mumbai India"},{"name":"Homi Bhabha National 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